Ceiling construction.



I No. 741,593. PATENTED OCT-13,1903.

' W. DA. RYAN & L. L. SAGENDORPH.

CEILING CONSTRUCTION.

APPLICATION FILED JAIL 19, 1903.

N0 MODEL.

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No 741,593. PATEN'TED ocT. 13,1903

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CEILING CONSTRUCTION.

APPLICATION FILED 'JAN.19. 1903.

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UN TED STATES Patented October 13, 1903; I

PAT NT OFFICE.

WALTER DA. RYAN, OF LYNN, MASSACHUSETTS, AND LONGLEY L. SAGEN- DORPH, OFPHILADELPHIA, PENNSYLVANIA, ASSIGNORS OF ONE-THIRD TO I-IARLAN P. LLOYD,OF CINCINNATI, OHIO.

CEILING CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 741,593, dated October13, 1903.

Application filed January 19, 1903. Serial No. 139,644. (No model.)

IO ()ur invention consists in certainimprovements in the detailconstruction of metallic ceilings, having for its object the provisionof means whereby the curved metallic plates comprising thereflecting-surface for a lamp r may be made to join rectangularceiling-plates of any or" the standard constructions at present known tothe art, a further object being to provide a construction such that thefitting of standard ceiling-plates to such curved pieces may be quicklyand easily accomplished and that without the necessity for or use ofunsightly joints.

ing had to the accompanying drawings, in which- Figure l is an invertedplan view illustrat-' ing a section of a metallic ceiling and showingour improved construction by which standard ceiling-plates of varyingsizes may 0 be fitted to a circular metallic reflecting-section. Fig. 2represents aninverted plan view of a special form of section, showingthe applicability of our improved construction thereto; and Fig. 3 is anenlarged sectional 5 elevation taken on the line 3 3, Fig.1,illustrating the detail construction of a ceilingsection made accordingto our invention.

In the above drawings, A represents a reflecting ceiling-section, whichin the case 40 illustrated is made in two parts,of which one,

a, consists of a substantially conical surface provided with a number ofannular projections or corrugations of increasing amplitude from the.apex of said surface to its base,

while thesecond part, a, of'said surface is concave in form andextendsdownwardlyand outwardly from the base of said conical surface.Any desired source of light is placed in the line of the vertical axisof the surface These objects we attain as hereinafter set forth,reference bea and adjacent to its apex, this source being in the deviceillustrated an electric-arc lamp of the inclosed-arc type.

In order that the above device may have a sightly appearance and may atthe same time be conveniently united to standard rectangular metallicceiling-plates, we unite to the lower edge of the surface a anupwardly-extending annular portion a which as it approaches the level ofthe ceiling is provided with one or more annular flanges a havinggrooves a r The ceilingrepresented at B has in the case illustratedaseries of 'furring-strips', of which one is shown at b, and to these thereflecting structure as well as the metallic ceiling-plates are fastenedin any desired manner," being thereby retained in position.

7 By reference to Fig. 1 it will be seen that we provide four sectionsor pieces O, designed to surround the reflecting-section'A, formingtogether a figure whose external configurathere being also, as abovenoted, corresponding recesses or grooves of in one of the flanges 8oprojecting from the annular portion (1 of the reflecting-surface. Itwill be seen, therefore, that by the useof the sections 0 the curvedsection A, which may be made, as shown in Figs. 1 and 2, either circularor elliptical in outline, is extended so that angular ceilingplates D,which in the case illustrated are four-sided and of various sizes, maybe united therewith to form a regular and sightly construction ofceiling, the grooved or recessed o portions d of said ceiling-platesfitting into the correspondingly-formed recessed portions 0 of thejunction-pieces O and .these inturn uniting with the grooved flanges ofthe curved reflecting-section. 9 5

We claim as our invention- 3 1. The combination of a series ofceilingplates, with a light-reflecting section, said section forming aportion of the ceiling and being joined to said plates, substantially asdescribed.

2. The combination of a series of ceilingplates, with a section placedto be substantially continuous therewith, said section having alight-reflecting portion, substantially as described.

3. The combination of a series of ceilingplates, a curved reflectingceiling-section and junction-plates uniting the ceiling-plates with saidreflecting-section, substantially as described.

4. The combination of a reflecting ceilingsection having a curvedoutline, and a series of junction-sections of a construction to fit theceiling-section, said junction-sections being of an angular exteriorconfiguration, with aseries of ceiling-plates constructed to unite withsaid junction-sections, substantially as described.

5. The combination of a ceiling-section having a curved outline, saidsection having a grooved flange surrounding the same, a series ofjunction-sections having portions designed to fit said grooves of thecurved section and to form together a figure of angular out1ine,andceilingplates also having grooved portions and designed to unite withsaid junction-sections to form a complete ceiling, substantially asdescribed.

6. The combination of a light-reflecting ceiling-section of curvedoutline, an annular flanged portion surrounding the same, said flangedportion being grooved, a series of junction sections having groovedportions designed to fit the grooved portion of the curved section, saidjunction-sections completely surrounding the curved section and beingrectangular in outline, with a series of ceiling-plates grooved alongtheir edges and designed to be united to the correspondinglygroovedportions of said junction-sections, substantially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

WALTER DA. RYAN. LONGLEY L. SAGENDORPIT. \Vitnesses:

WILLIAM E. BRADLEY, J os. 11. KLEIN.

